// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <string>

#include "base/time/time.h"
#include "base/values.h"
#include "cc/debug/rendering_stats.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace cc {
namespace {

    static std::string ToString(const RenderingStats::TimeDeltaList& list)
    {
        std::unique_ptr<base::trace_event::TracedValue> value(
            new base::trace_event::TracedValue());
        list.AddToTracedValue("list_value", value.get());
        return value->ToString();
    }

    TEST(RenderingStatsTest, TimeDeltaListEmpty)
    {
        RenderingStats::TimeDeltaList time_delta_list;
        EXPECT_EQ("{\"list_value\":[]}", ToString(time_delta_list));
    }

    TEST(RenderingStatsTest, TimeDeltaListNonEmpty)
    {
        RenderingStats::TimeDeltaList time_delta_list;
        time_delta_list.Append(base::TimeDelta::FromMilliseconds(234));
        time_delta_list.Append(base::TimeDelta::FromMilliseconds(827));

        EXPECT_EQ("{\"list_value\":[234.0,827.0]}", ToString(time_delta_list));
    }

    TEST(RenderingStatsTest, TimeDeltaListAdd)
    {
        RenderingStats::TimeDeltaList time_delta_list_a;
        time_delta_list_a.Append(base::TimeDelta::FromMilliseconds(810));
        time_delta_list_a.Append(base::TimeDelta::FromMilliseconds(32));

        RenderingStats::TimeDeltaList time_delta_list_b;
        time_delta_list_b.Append(base::TimeDelta::FromMilliseconds(43));
        time_delta_list_b.Append(base::TimeDelta::FromMilliseconds(938));
        time_delta_list_b.Append(base::TimeDelta::FromMilliseconds(2));

        time_delta_list_a.Add(time_delta_list_b);
        EXPECT_EQ("{\"list_value\":[810.0,32.0,43.0,938.0,2.0]}",
            ToString(time_delta_list_a));
    }

} // namespace
} // namespace cc
